the west blue is part of the world map and has many pirates that come from it..some are..

Dr. Hogback:is a "genius surgeon" who is famous among all doctors around the world. He was known to save thousand of lives with his miracle operations. Many worldwide doctors would travel to him and honor him. However, he vanished one day. It was thought by many to be a kidnapping plot or something of the sort. For that his name had faded into legend. In reality however he met Gecko Moria ten years ago and traveled with him to Thriller Bark to help him create an undead army. He resides in his mansion in front of the main mast of Thriller Bark. He is primarily responsible for creating all the bodies of all the creatures that reside on Thriller Bark. He is one of the major antagonists of the Thriller Bark arc.

Laboon: is an extremely large whale (of comparable or greater size than the monsters in Calm Belt), native to West Blue, whom the Straw Hat Pirates encounter immediately after entering the Grand Line.

Lafitte: is a member of the Blackbeard pirates. According to his character description in Volume 46, he was revealed to be a navigator for the Blackbeard Pirates.

Mr.1, real name Daz Bones, is the highest ranked male Officer Agent in Baroque Works and the strongest under Crocodile himself.

Nico Robin: is the archaeologist of the Straw Hat Pirates. She was originally introduced as the Vice President of Baroque Works known as Miss All Sunday before joining up with the Straw Hats. She ate the Hana Hana no Mi.

Red-Haired Shans: is the pirate who inspired Luffy to go on his journey and is the captain of the Red-Haired Pirates. He is one of the Yonkou Pirates in the second half of the Grand Line.